The candy-colored hand-blown glass pipes started it all. They drew Darryl Rouson to the Purple Haze Tobacco & Accessories Shop, where the pipes fill display cases. Rouson asked the owner to stop selling "death utensils under the guise of tobacco accessories," alluding to the contention that the pipes and glass tubes are used to smoke drugs like crack. Purple Haze's owner, Leo Calzadilla, and other employees repeatedly asked Rouson to leave the store at 1427 34th St. S, Calzadilla told police. Rouson said he didn't leave because he was frightened by pit bullterriers in the store. In April, the St....